Well i'm pretty stoked about the new ground zone, the undine stuff, and the new pvp system. And Tuvok doing more missions is great, but i wish they would use him in an stf or something that i'll want to play often.
I'm skeptical about the crafting system though. I always hoped for a good crafting system in sto, but i worry that it will still be just a money sink with no real diverse crafting capability.
As for the foundry, i won't ever really be happy with it until i can create custom sized blocks with ample color/texture capability, but it's possible that the new interior editor might include this capability or be a decent work around for that problem.